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#1
04-28-2015, 08:56 AM
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I have a 60-100X top lighted microscope I use to check out cards for alterations.
I also take a high resolution scan and then hook my laptop up to my tv. Depending on TV size/quality you can look at a 2'X3' or bigger card. I have no idea what the grading companies do, maybe spin a wheel.  
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#2
04-28-2015, 11:28 AM
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Seems way overkill for grading, but microscopes are very much useful for authentication and alteration detection. The no name T206 of Net54 fame was examined under a high power microscope.
As with a black light, there are 101 uses for a microscope beyond baseball cards. Synthetic (fake) leather, parchment and vellum is easily identified under the microscope due to the obviously machine made pattern.
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